New River Evaluation at the Calexico Port of Entry, Calexico, California



Perkins+Will 185 Berry, Lobby One Suite 5100



River Crossing Feasibility Analysis; Alternatives Development Analysis; Hydraulic Analysis (HEC-RAS); Hydrology Study; Structural Calculation; Conveyance Drawings; Cost Estimates; Risk Analysis

$40 Million


DRC provided expert subconsultant engineering to the architectural firm Perkins+Will for the feasibility of the design and construction of the New River border crossing conveyance structure and risk analysis. DRC prepared a report that addressed the issue of two 500-year design flows for the river and made recommendations between a FEMA flood insurance report for Calexico, CA, and the 500-year flow as estimated from data in the US Army Corps of Engineers (USACE) report for New River at the City of Brawley. Our team conducted a hydraulic and hydrology study, a (USACE) HEC-RAS analysis, cost estimation, and an evaluation report of the New River in Calexico. DRC provided alternatives and a decision for the design flow, the risk of flooding, and the costs associated with that risk for the project owner, United States General Services Administration. The study included a proposed new 700-foot long reinforced concrete conveyance structure for New River that could carry the 500-year flood safely through the area without flooding and without pressure flow.